Translator Disclaimer
17 December 2012 Novelties in the fern genus Polystichum (Dryopteridaceae) I. Three new taxa for Cuba
Author Affiliations +
Abstract

A recent study of about 2500 specimens from 23 herbaria globally complemented a taxonomic study of Cuban species of the genus Polystichum that has been carried out since 2000. Three new taxa of Cuban Polystichum are described: P. decoratum subsp. habanense, P. guajaibonense and P. sanchezii. The differences to allied species are discussed for each taxon. P. decoratum subsp. habanense, endemic to western Cuba, can be distinguished from the nominal subspecies, endemic to eastern Cuba, by the leaf morphology, the presence of a basiscopic auricle on the basal pinnae, pinna margin and position of the sori. P. guajaibonense is endemic to western Cuba and, based on the proliferous flagelliform apex, can be confused with P. machaerophyllum and P. ilicifolium, two species from eastern Cuba, from which it can nevertheless easily be distinguished by the conduplicate petiole scales and the conspicuously serrate margin immediately above the auricles. P. sanchezii co-occurs in central Cuba with P. trapezoides and can be separated from it by the 1-pinnate frond, shorter leaf apices, crenate pinna margin, sharply triangular pinnae auricles and the irregular and bicolored indusium margin. Pictures of the type specimens of each taxon are also provided.

See the PDF.

References

  1. D. S. Barrington 1985: The present evolutionary and taxonomic status of the fern genus Polystichum. — Amer. Fern. J. 75: 22–28. Google Scholar

  2. C. Christensen 1936: The collection of Pteridophyta made in Hispaniola by E. L. Ekman, 1917 and 1924– 1930. — Kongl. Svenska Vetenskapsakad. Handl., Ser. 3. 16(2): 30–41. Google Scholar

  3. R. A. Howard 1988. Charles Wright in Cuba, 1856–1867. — Alexandria, VA.: Chadwyck-Healey. Google Scholar

  4. I. W. Knobloch 1976: Pteridophyte hybrids. — Publ. Mus. Michigan State Univ., Biol. Ser. 5(4): 277–352. Google Scholar

  5. C. X. Li , S. G. Lu & Q. Yang 2004: Asian origin for Polystichum (Dryopteridaceae) based on rbcL sequences. — Chin. Sci. Bull. 49: 1146–1150. Google Scholar

  6. D. P. Little & D. S. Barrington 2003: Major evolutionary events in the origin and diversification of the fern genus Polystichum (Dryopteridaceae). — Amer. J. Bot. 90: 508–514. Google Scholar

  7. W. R. Maxon 1909: Studies of tropical American ferns. — no. 2 — Contr. U.S. Nat. Herb. 13: 1–43. Google Scholar

  8. W. R. Maxon 1912: Studies of tropical American ferns. — no. 3 — Contr. U.S. Nat. Herb. 16: 25–62. Google Scholar

  9. W. R. Maxon 1922: Studies of tropical american ferns. — no. 7 — Contr. U.S. Nat. Herb. 24: 33–63. Google Scholar

  10. J. T. Mickel 1997: A review of the West Indian species of Polystichum. — Pp. 119–143 in: R. J. Johns (ed.), Holttum Memorial Volume. — Kew: Royal Botanical Gardens. Google Scholar

  11. C. V. Morton 1967: Studies of fern types, I. — Contr. U.S. Natl. Herb. 38: 29–83. Google Scholar

  12. G. R. Proctor 1977: Pteridophyta. — In: R. A. Howard , Flora of the Lesser Antilles, Leeward and Windward Islands, 2. — Jamaica Plain: Arnold Arboretum. Google Scholar

  13. G. R. Proctor 1985: Ferns of Jamaica. — London: British Museum (Natural History). Google Scholar

  14. G. R. Proctor 1989: Ferns of Puerto Rico and the Virgin Islands. — Mem. New York Bot. Gard. 53. Google Scholar

  15. L. Regalado , I. Ventosa & R. Morejón 2008: Revisión histórica de los herbarios cubanos con énfasis en las series de especímenes. — Revista Jard. Bot. Nac. Univ. Habana 29: 101–138. Google Scholar

  16. E. Schuettpelz & K. M. Pryer 2007: Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. — Taxon 56: 1037–1050. Google Scholar

  17. A. R. Smith , K. M. Pryer , E. Schuettpelz , P. Korall , H. Schneider & P. G. Wolf 2006: A classification for extant ferns. — Taxon 55: 705–731. Google Scholar

  18. B. Thiers 2008+ [continuously updated]: Index herbariorum: a global directory of public herbaria and associated staff. — New York Botanical Garden,  http://sweetgum.nybg.org/ih/Google Scholar

  19. R. M. Tryon & A. F. Tryon 1982: Ferns and allied plants with special reference to Tropical America. — New York, etc.: Springer. Google Scholar

© 2012 BGBM Berlin-Dahlem.
Renier Morejón Hernández and Carlos Sánchez "Novelties in the fern genus Polystichum (Dryopteridaceae) I. Three new taxa for Cuba," Willdenowia 42(2), (17 December 2012). https://doi.org/10.3372/wi.42.42213
Published: 17 December 2012
JOURNAL ARTICLE
9 PAGES


SHARE
ARTICLE IMPACT
Back to Top